+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1243 Pamela (1932 JE) Classification: Main-belt Asteroid          SPK-ID: 2001243 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04756290661129741 3.5282e-08   a 3.100950762213112 1.2407e-08 au q 2.953460530703738 1.1245e-07 au i 13.27137286242597 3.9844e-06 deg node 245.6552191466734 1.5527e-05 deg peri 54.0110463646024 4.1793e-05 deg M 348.9627934867589 3.8113e-05 deg tp 2459061.650132206610 (2020-Jul-31.15013221) 0.00021116 TDB period 1994.530732751058 5.46 1.197e-05 3.277e-08 d yr n .1804935838233245 1.0833e-09 deg/d Q 3.248440993722486 1.2997e-08 au   Orbit Determination Parameters    # obs. used (total)      3178      data-arc span      32363 days (88.61 yr)      first obs. used      1932-04-04      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39546      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:59:22   Additional Information  Earth MOID = 1.95765 au   Jupiter MOID = 1.86302 au   T_jup = 3.179  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.7   n/a MPO347525   diameter diameter 69.883 km 0.420 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 26.017 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Warner, B.D. (2000) Minor Planet Bull. 27, 4-6.] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.] geometric albedo albedo 0.040   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1243 Pamela (1932 JE)          Discovered 1932-May-07 by Jackson, C. at Johannesburg (UO) Subsequently reported as discovered on Apr. 4 by E. L. Johnson. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1932 JE = 1929 XD = 1934 VL = 1951 AN = 1954 JO  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 16:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin